Ouachita Mountains, range of east-west ridges between the Arkansas and Red rivers, extending c.200 mi (320 km) from central Ark. into SE Okla. Magazine Mt. (c.2,800 ft/850 m high) is the tallest peak. The Ouachita Mts. are geologically considered outlier of the Appalachian Mts. They are composed of strongly folded and faulted sedimentary rocks. A whetstone industry is near Hot Springs, Ark. Mineral springs, lakes, and extensive wooded areas attract tourists. Several parts of the region have been set aside as public parks or forest reservations.